Tory ministers are said to be furious that people who want to extend their homes or build conservatories will be forced to pay for extra insulation themselves or sign up to the Government’s “Green Deal”, which provides loans to install energy-saving insulation that must be paid back with interest.

The disclosures come as ministers also prepare to pull back from onshore wind farms, after more than 100 backbench Conservative MPs mounted a rebellion against turbines blighting rural areas.

Greg Barker, the climate change minister, hinted at a change in policy this weekend when he said that “the wind we need” in Britain is already being built, developed or in planning.

“It’s about being balanced and sensible,” he said. “We inherited a policy from the last government which was unbalanced in favour of onshore wind.

“There have been some installations in insensitive or unsuitable locations – too close to houses, or in an area of outstanding natural beauty.”

Britain already has about 350 wind farms, with around 500 more under construction or awaiting planning permission. This means the number of wind farms built in the countryside could still double from the current level.

However, it is understood that senior Conservatives in the Coalition are behind a determination to scale back support for onshore wind power, amid fears the turbines are deeply unpopular in rural areas.

There is also concern that subsidising so many different types of “green” energy is adding too much to energy bills. Senior Conservatives have seen an opportunity to rethink policy since the resignation of Chris Huhne, the former Liberal Democrat energy secretary. The plan could still put the Conservatives on collision course with their Coalition partners, as Ed Davey, the new energy secretary, is also a Liberal Democrat.

However, sources said ministers were prepared to block major developments of onshore wind turbines under the Localism Act that came into force last month. They are also ready to reduce the £400 million per year in funding that goes to wind farms under the Renewable Obligation Certificate subsidy.

The moves would be popular with the dozens of Conservative MPs fighting against new wind developments in their constituencies.